ILLUSTRATION BY PATRICK FARICY

STANDARDS

NGSS: Core Idea: LS1.D, LS1.A

CCSS: RI.8

TEKS: 6.3C, 7.3C, 7.13A, 8.3C, BIO.3C

Are You Suffering From Brain Rot?

Why hours of scrolling through pointless online posts and videos can make it feel like your brain has turned to mush.

AS YOU READ, THINK ABOUT how passive scrolling can be addictive.

You're bored. To pass time, you grab your phone and open TikTok. Your eyes glaze over as you swipe through a never-ending stream of short, ridiculous videos. They feature memes that have spread across the internet: Skibidi Ohio Rizz. 6-7. Tung Tung Tung Sahur. Ballerina Cappuccina.

Hours pass. You’re not really enjoying yourself, but you can’t stop scrolling. When you finally put your phone down, you feel tired and overwhelmed—like your mind is in a fog. A few minutes later, you pick up your phone and open TikTok again.

You’re bored. To pass time, you grab your phone and open TikTok. You swipe through a never-ending stream of short, silly videos. Your eyes glaze over. The videos feature memes that have spread across the internet: Skibidi Ohio Rizz. 6-7. Tung Tung Tung Sahur. Ballerina Cappuccina.

Hours pass. You’re not really having fun, but you can’t stop scrolling. Finally, you put your phone down. You feel tired and overwhelmed, like your mind is in a fog. A few minutes later, you pick up your phone and open TikTok again.

VIA YOUTUBE

SKIBIDI TOILET: This meme-filled series debuted on YouTube Shorts in February 2023.

This inability to stop thinking about or watching terrible digital media is sometimes called “brain rot.” And the name is accurate! According to research, mindlessly scrolling through posts and short videos really does shrink your attention span and harm your ability to think. Read on to find out how too much screen time can reshape your brain—and learn some tricks that might make it easier to walk away from your smartphone.

Sometimes we can’t stop thinking about or watching terrible digital media. This has been called “brain rot.” And the name is accurate! Research shows the effects of mindlessly scrolling through posts and short videos. It shrinks your attention span and harms your ability to think. Too much screen time can reshape your brain. Read on to see how. Plus learn some tricks to make it easier to walk away from your smartphone.

GETTING HOOKED

From the school bus to the grocery store, it might feel like every place you go is full of zombified people, mindlessly glued to their phones. Don’t feel bad if your reaction is to pull out your own phone and join them. The apps on your smartphone are designed to hijack your attention.

“Big social media companies have teams of psychologists whose job it is to make their apps as addictive as possible,” says Noah Castelo, a marketing professor at the University of Alberta in Canada. Your attention is valuable, explains Castelo. “These companies make money by selling advertisements. They can sell more ads when more people spend more time on the apps.”

You see them on the school bus and in the grocery store. It seems like zombified people are everyplace you go. They’re mindlessly glued to their phones. Don’t feel bad if you sometimes feel like pulling out your own phone to join them. The apps on your smartphone are designed to steal your attention.

“Big social media companies have teams of psychologists whose job it is to make their apps as addictive as possible,” says Noah Castelo. He’s a marketing professor at the University of Alberta in Canada. Your attention is valuable, explains Castelo. “These companies make money by selling advertisements. They can sell more ads when more people spend more time on the apps.”

47 SECONDS: The average attention span of an adult in 2021. Twenty years ago, it was 2.5 minutes.

SOURCE: THE OHIO STATE UNIVERSITY WEXLER MEDICAL CENTER

SOURCE: THE OHIO STATE UNIVERSITY WEXLER MEDICAL CENTER

VIA TIKTOK

BALLERINA CAPPUCCINA: An AI-generated character that first became popular on TikTok in March 2025

Social media apps employ a lot of tricks to keep people engaged. These apps are extremely easy to use (just swipe). They also include functions, such as liking and sharing, that feel rewarding. Perhaps their most addictive features are autoplay and the infinite scroll. Simply open the app and video after video starts to play. An algorithm—a set of rules a computer follows— automatically chooses which videos to show you based on what you’ve watched before. “You never run out of content,” says Castelo. “There’s no natural stopping point, like when you finish a chapter in a book.”

As you swipe through videos, your brain releases dopamine. It’s a neurotransmitter, or chemical messenger, that’s part of the brain’s reward system. It makes you want to repeat an action over and over. You might get a rush of dopamine when you score a goal in a soccer game or ace a test. Your brain craves this chemical—it makes you feel like you did something that’s good for you. But harmful things can also cause a surge of dopamine. It’s the main reason why you can’t stop scrolling, even after you don’t really want to anymore.

Social media apps use many tricks to keep people engaged. These apps are extremely easy to use (just swipe). They also include functions such as liking and sharing. These feel rewarding. Their most addictive features might be autoplay and the endless scroll. Just open the app and video after video starts to play. An algorithm is a set of rules a computer follows. It automatically chooses videos for you based on what you’ve watched before. “You never run out of content,” says Castelo. “There’s no natural stopping point, like when you finish a chapter in a book.”

Your brain releases dopamine as you swipe through videos. Dopamine is a neurotransmitter, or chemical messenger. It’s part of the brain’s reward system. It makes you want to repeat an action over and over. Maybe you score a goal in a soccer game or ace a test. Then you might get a rush of dopamine. Your brain craves this chemical. It makes you feel like you did something good for yourself. But harmful things can also cause a rush of dopamine. So you might keep scrolling, even after you don’t really want to anymore. Dopamine is the main reason.

8 HOURS AND 39 MINUTES: The average amount of time U.S. teens spend looking at screens each day—not including time spent using screens for school or homework.

 

2 HOURS: The maximum daily screen time recommended by health experts.

SOURCES: COMMON SENSE MEDIA, THE NATIONAL INSTITUTES OF HEALTH

SOURCES: COMMON SENSE MEDIA, THE NATIONAL INSTITUTES OF HEALTH

CHANGING THE BRAIN

Driven by stress, boredom, or loneliness, more people are turning to brain rot and other time-wasting content to try to relax or pass the time. Unfortunately, this type of passive scrolling doesn’t just make those unpleasant feelings worse. It also rewires our brains, changing the way we think.

When people feel stressed, bored, or lonely, they look for ways to relax or pass the time. More people are turning to brain rot and other time-wasting content. But this type of passive scrolling makes those unpleasant feelings worse. Sadly, it also rewires our brains and changes the way we think. 

VIA TIKTOK

ERM, WHAT THE SIGMA?: An audio clip of this phrase (said in a voice that sounds like Squidward from SpongeBob Squarepants) went viral in 2024.

Health experts recommend no more than two hours of screen time per day. Studies show that when you exceed this, it’s harder to form new memories and remember old ones. It’s also more difficult to control your emotions and pay attention. Watching a ton of short videos is “training our brains to only pay attention in 30-second bursts,” says Castelo. Our brains learn by building pathways that connect different ideas. Those pathways help us understand the rules of a sport, nail new dance moves, and answer questions on a test. But your brain can’t form connections if it’s constantly being interrupted by short bursts of content.

There’s even evidence that excessive screen time can shrink gray matter—the outer layer of the brain, which receives and processes information (see “Brain Drain”). Gray matter controls things like language and problem-solving. It also keeps track of almost everything we learn. Loss of gray matter affects memory, emotional regulation, and overall mental sharpness. Kids and teens are especially affected by these changes. “The adolescent brain is still malleable, or easy to shape. This means it is more vulnerable to effects from their environment—including screen time,” explains Suparna Choudhury, a neuroscientist at McGill University in Canada who studies the brain.

Health experts recommend no more than two hours of screen time per day. When people exceed this, studies show harmful effects. It’s harder to form new memories and remember old ones. It’s also harder to control your emotions and pay attention. Watching a ton of short videos is “training our brains to only pay attention in 30-second bursts,” says Castelo. Our brains build pathways to connect different ideas. That’s how we learn. Those pathways help us understand the rules of a sport, nail new dance moves, and answer questions on a test. But this doesn’t happen if short bursts of content constantly interrupt your brain. Then it can’t form connections.

Evidence shows that too much screen time can shrink gray matter. That’s the outer layer of the brain. It receives and processes information (see “Brain Drain”). Gray matter controls things like language and problem-solving. It also keeps track of almost everything we learn. Loss of gray matter affects memory, emotional control, and overall mental sharpness. These changes affect kids and teens even more. “The adolescent brain is still malleable, or easy to shape. This means it is more vulnerable to effects from their environment—including screen time,” explains Suparna Choudhury. She’s a neuroscientist at McGill University in Canada who studies the brain.

TAKE BACK YOUR ATTENTION

So what are some ways you can reclaim your brain? Avoid scrolling before you go to sleep. Try putting your phone on grayscale so you aren’t sucked in by the bright colors. Delete an addictive app for a few days and see how it makes you feel. These tips won’t just help fight brain rot. Less time on social media can also improve your mental health (see “Take Control of Your Social Media,” in Science World, December 16, 2024).

One recent study found that simply keeping your phone nearby harms your ability to think—even when the device is stowed in a desk or backpack. That’s because ignoring your phone is distracting. The best thing you can do is put it in a different room, freeing up your brain to focus on what you actually want to do.

So how can you reclaim your brain? Don’t scroll before you go to sleep. Put your phone on grayscale. Then the bright colors won’t suck you in. Delete an addictive app for a few days and see how you feel. These tips won’t just help fight brain rot. You’ll spend less time on social media. And that can improve your mental health (see “Take Control of Your Social Media,” in Science World, December 16, 2024).

If you keep your phone nearby, it’s harder to think. That’s what one recent study found. This is true even if the device is in a desk or backpack. It distracts you to ignore your phone. So put the phone in a different room. That’s the best thing you can do. It frees up your brain. Then you can focus on what you want to do.

40%: The percentage of 12-to-15-year-olds who say they are now taking breaks from smartphones, computers, and tablets.

SOURCES: PEW RESEARCH

SOURCES: PEW RESEARCH

At first, spending time away from your phone may feel weird or uncomfortable. But you’ll soon notice positive effects. Castelo’s team asked a group of people to reduce their smartphone use for two weeks. “Their attention spans improved significantly, and they felt less anxious and depressed,” says Castelo.

Daisy Greenwell has seen these positive effects firsthand. She co-founded a campaign in the United Kingdom that asks parents to delay giving their children smartphones until they turn 14. It’s been a big success, says Greenwell. “We’ve heard stories of kids rediscovering hobbies they’d forgotten about. There’s more talking, more creativity, more confidence. More real life. Reclaiming your focus is like getting a superpower back! Choosing to step away means taking back your time for the things that actually matter to you.”

This means spending time away from your phone. At first, that may feel weird or uncomfortable. But you’ll soon notice positive effects. Castelo’s team asked people to reduce their smartphone use for two weeks. “Their attention spans improved significantly, and they felt less anxious and depressed,” says Castelo.

Daisy Greenwell sees these positive effects firsthand. She co-founded a campaign in the United Kingdom. It asks parents to delay giving their children smartphones until age 14. It’s been a big success, says Greenwell. “We’ve heard stories of kids rediscovering hobbies they’d forgotten about. There’s more talking, more creativity, more confidence. More real life. Reclaiming your focus is like getting a superpower back! Choosing to step away means taking back your time for the things that actually matter to you.” 

MAKING OBSERVATIONS: Think about your favorite social media platform. How does it keep you on the app? List the ways your attention is being manipulated.

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